Do you wash your dreadlocks when you first get them?

It depends on which method you have used to create your locks. If you are doing a neglect method, you need to keep your hair clean and regularly wash it using a residue-free shampoo.

If you are doing the back-combing method, you will not want to wash your locks for about a week to two weeks after backcombing your hair. After the first week or two, you will regularly wash your hair with a residue-free shampoo. Check out the links to buy some of this residue-free, all-natural shampoo.

As for a dread "perm" I have no idea, but whatever salon is giving you the dreadlock perm certainly should know the answer. don't wash it too much, and do it very delicately. try concentrating on the scalp, not on the hair... and in the bathtub it can be better than in the shower, that way you don't have the pressurised stream of water running down your hair.